arch/i386/mach-visws/reboot.c

   1 #include <linux/module.h>
   2 #include <linux/smp.h>
   3 #include <linux/delay.h>
   4 #include <linux/platform.h>
   5
   6 #include <asm/io.h>
   7 #include "piix4.h"
   8
   9 void (*pm_power_off)(void);
  10
  11 void machine_restart(char * __unused)
  12 {
  13 #ifdef CONFIG_SMP
  14         smp_send_stop();
  15 #endif
  16
  17         /*
  18          * Visual Workstations restart after this
  19          * register is poked on the PIIX4
  20          */
  21         outb(PIIX4_RESET_VAL, PIIX4_RESET_PORT);
  22 }
  23
  24 EXPORT_SYMBOL(machine_restart);
  25
  26 void machine_power_off(void)
  27 {
  28         unsigned short pm_status;
  29         extern unsigned int pci_bus0;
  30
  31         while ((pm_status = inw(PMSTS_PORT)) & 0x100)
  32                 outw(pm_status, PMSTS_PORT);
  33
  34         outw(PM_SUSPEND_ENABLE, PMCNTRL_PORT);
  35
  36         mdelay(10);
  37
  38 #define PCI_CONF1_ADDRESS(bus, devfn, reg) \
  39         (0x80000000 | (bus << 16) | (devfn << 8) | (reg & ~3))
  40
  41         outl(PCI_CONF1_ADDRESS(pci_bus0, SPECIAL_DEV, SPECIAL_REG), 0xCF8);
  42         outl(PIIX_SPECIAL_STOP, 0xCFC);
  43 }
  44
  45 EXPORT_SYMBOL(machine_power_off);
  46
  47 void machine_halt(void)
  48 {
  49 }
  50
  51 EXPORT_SYMBOL(machine_halt);